[3162858] | 1 | # RTEMS Tools Project (http://www.rtems.org/) |
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| 2 | # Copyright 2010-2014 Chris Johns (chrisj@rtems.org) |
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| 3 | # All rights reserved. |
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[56a70ae] | 4 | # |
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[3162858] | 5 | # This file is part of the RTEMS Tools package in 'rtems-tools'. |
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| 6 | # |
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| 7 | # Redistribution and use in source and binary forms, with or without |
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| 8 | # modification, are permitted provided that the following conditions are met: |
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| 9 | # |
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| 10 | # 1. Redistributions of source code must retain the above copyright notice, |
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| 11 | # this list of conditions and the following disclaimer. |
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| 12 | # |
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| 13 | # 2. Redistributions in binary form must reproduce the above copyright notice, |
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| 14 | # this list of conditions and the following disclaimer in the documentation |
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| 15 | # and/or other materials provided with the distribution. |
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[56a70ae] | 16 | # |
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[3162858] | 17 | # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 18 | # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 19 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 20 | # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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| 21 | # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 22 | # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 23 | # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 24 | # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 25 | # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 26 | # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 27 | # POSSIBILITY OF SUCH DAMAGE. |
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| 28 | # |
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| 29 | |
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| 30 | # |
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| 31 | # RTEMS Chains Support |
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[56a70ae] | 32 | # |
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| 33 | |
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| 34 | import gdb |
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| 35 | |
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| 36 | class node: |
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| 37 | """Manage the Chain_Node.""" |
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| 38 | |
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| 39 | def __init__(self, node_val): |
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| 40 | self.node_val = node_val |
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| 41 | |
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| 42 | def null(self): |
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[10bcd5d] | 43 | if not self.node_val: |
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| 44 | return True |
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| 45 | return False |
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[56a70ae] | 46 | |
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| 47 | def next(self): |
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| 48 | if not self.null(): |
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[10bcd5d] | 49 | self.node_val = self.node_val['next'] |
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[56a70ae] | 50 | |
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| 51 | def previous(self): |
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| 52 | if not self.null(): |
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[10bcd5d] | 53 | self.node_val = self.node_val['previous'] |
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[56a70ae] | 54 | |
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| 55 | def cast(self, typename): |
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| 56 | if not self.null(): |
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| 57 | nodetype = gdb.lookup_type(typename) |
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| 58 | return self.node_val.cast(nodetype) |
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| 59 | return None |
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| 60 | |
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[b061a67] | 61 | def to_string(self): |
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| 62 | return self.node_val['next'] + "Prev: "+self.node_val['previous'] |
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[10bcd5d] | 63 | |
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[56a70ae] | 64 | class control: |
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| 65 | """Manage the Chain_Control.""" |
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| 66 | |
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| 67 | def __init__(self, ctrl): |
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| 68 | self.ctrl = ctrl |
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| 69 | |
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| 70 | def first(self): |
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[10bcd5d] | 71 | t = node(self.ctrl['Head']['Node']) |
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| 72 | return t |
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[56a70ae] | 73 | |
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| 74 | def last(self): |
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[b061a67] | 75 | return node(self.ctrl['Tail']['Node']) |
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| 76 | |
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[a7176a8] | 77 | def empty(self): |
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| 78 | if self.last() == self.first().next(): |
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| 79 | return True |
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